【Vue】elementUI el-dialog embed标签无法实时更新预览PDF文件问题

 opened () {
      if (this.fileUrl) {
        let oldEmbed = document.querySelector("embed");
        if(oldEmbed != null){
          oldEmbed.parentNode.removeChild(oldEmbed)
        }
        let dialogBody = document.querySelector(".dialog-content")
        let embed = document.createElement("embed")
        embed.src = this.fileUrl
        embed.style.width = "100%"
        embed.style.height = "100%"
        dialogBody.appendChild(embed)
      }
    },